Samurai animation test made in JavaScript with Claude Opus: Claude Opus launch video
Originally posted by @chrisjdimarco on X · posted Sep 24, 2026 · curated by MotionHunt, updated Oct 15, 2026

In short
The post is an Opus 5.5 test in which the author shares a prompt asking for a samurai figure built only with JavaScript, performing a routine in one spot. The routine is meant to show impressive poses, motions and positions in a fiery display. No duration or aspect ratio is stated.
Prompt
make a samurai dude in only javascript and have him doing a routine in a single spot going through various seriously impressive poses and motions and positions in a fiery awesome displayHow it was made
The author calls it "another Opus 5.5 test" and shares the single prompt used. The prompt requires the figure to be made in only JavaScript. The author shared no further details on rendering, tools, time or cost.
- Tools
- Claude Opus
Why it works
- The prompt sets one constraint, JavaScript only, which makes the test about what code alone can produce.
- A single fixed spot keeps attention on the character's poses and movement rather than on scene changes.
- The prompt asks for a range of poses, motions and positions, which gives the routine variety from start to finish.
- The 'fiery awesome display' direction sets a clear visual mood for the whole piece.
Remix it for your product
make a [PRODUCT] in only javascript and have it doing a routine in a single spot going through various [FEATURES] in a fiery awesome displayFAQ
What tool made this launch video?
This video was made with Claude Opus.
Can I see the prompt behind this video?
Yes. The full prompt is shown on this page (from the author's post). Credit the original creator if you reuse it.
What kind of product is this video for?
It is a launch video for a other product.
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